Finding the Fourth Proportional to 1,815.06, 2,503.86 and 1,372.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,815.06 : 2,503.86 = 1,372.20 : x
2. Step 2: Convert to fraction form
   1,815.06/2,503.86 = 1,372.20/x
3. Step 3: Cross multiply
   1,815.06x = 2,503.86 × 1,372.20
4. Step 4: Simplify right side
   1,815.06x = 3,435,796.69
5. Step 5: Solve for x
   x = 3,435,796.69/1,815.06
6. Step 6: Final answer
   x = 1,892.94